WO2000013217A1 - Liquide abrasif pour le polissage de metaux et procede correspondant - Google Patents
Liquide abrasif pour le polissage de metaux et procede correspondant Download PDFInfo
- Publication number
- WO2000013217A1 WO2000013217A1 PCT/JP1999/004694 JP9904694W WO0013217A1 WO 2000013217 A1 WO2000013217 A1 WO 2000013217A1 JP 9904694 W JP9904694 W JP 9904694W WO 0013217 A1 WO0013217 A1 WO 0013217A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal
- protective film
- polishing
- acid
- forming agent
- Prior art date
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- GAUZCKBSTZFWCT-UHFFFAOYSA-N azoxybenzene Chemical compound C=1C=CC=CC=1[N+]([O-])=NC1=CC=CC=C1 GAUZCKBSTZFWCT-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
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- XZTDQFYWZXXZNF-UHFFFAOYSA-N benzotriazol-1-ylmethylphosphonic acid Chemical compound C1=CC=C2N(CP(O)(=O)O)N=NC2=C1 XZTDQFYWZXXZNF-UHFFFAOYSA-N 0.000 description 1
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- JMGZBMRVDHKMKB-UHFFFAOYSA-L disodium;2-sulfobutanedioate Chemical compound [Na+].[Na+].OS(=O)(=O)C(C([O-])=O)CC([O-])=O JMGZBMRVDHKMKB-UHFFFAOYSA-L 0.000 description 1
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- LMBMDLOSPKIWAP-UHFFFAOYSA-N embutramide Chemical compound OCCCC(=O)NCC(CC)(CC)C1=CC=CC(OC)=C1 LMBMDLOSPKIWAP-UHFFFAOYSA-N 0.000 description 1
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- 230000001747 exhibiting effect Effects 0.000 description 1
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- 229940107698 malachite green Drugs 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229960004452 methionine Drugs 0.000 description 1
- RMIODHQZRUFFFF-UHFFFAOYSA-N methoxyacetic acid Chemical compound COCC(O)=O RMIODHQZRUFFFF-UHFFFAOYSA-N 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 1
- 229940012189 methyl orange Drugs 0.000 description 1
- XGEGHDBEHXKFPX-NJFSPNSNSA-N methylurea Chemical compound [14CH3]NC(N)=O XGEGHDBEHXKFPX-NJFSPNSNSA-N 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- ZVEZMVFBMOOHAT-UHFFFAOYSA-N nonane-1-thiol Chemical compound CCCCCCCCCS ZVEZMVFBMOOHAT-UHFFFAOYSA-N 0.000 description 1
- RLRKPMRCTMYDMP-UHFFFAOYSA-N octyl 2h-benzotriazole-4-carboxylate Chemical compound CCCCCCCCOC(=O)C1=CC=CC2=NNN=C12 RLRKPMRCTMYDMP-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 235000010292 orthophenyl phenol Nutrition 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- LCLHHZYHLXDRQG-ZNKJPWOQSA-N pectic acid Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)O[C@H](C(O)=O)[C@@H]1OC1[C@H](O)[C@@H](O)[C@@H](OC2[C@@H]([C@@H](O)[C@@H](O)[C@H](O2)C(O)=O)O)[C@@H](C(O)=O)O1 LCLHHZYHLXDRQG-ZNKJPWOQSA-N 0.000 description 1
- KHIWWQKSHDUIBK-UHFFFAOYSA-N periodic acid Chemical compound OI(=O)(=O)=O KHIWWQKSHDUIBK-UHFFFAOYSA-N 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 239000010318 polygalacturonic acid Substances 0.000 description 1
- 229920002643 polyglutamic acid Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 229920000656 polylysine Polymers 0.000 description 1
- 229920001444 polymaleic acid Polymers 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- VVWRJUBEIPHGQF-UHFFFAOYSA-N propan-2-yl n-propan-2-yloxycarbonyliminocarbamate Chemical compound CC(C)OC(=O)N=NC(=O)OC(C)C VVWRJUBEIPHGQF-UHFFFAOYSA-N 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- 229940080818 propionamide Drugs 0.000 description 1
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 description 1
- 235000019423 pullulan Nutrition 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 229940043230 sarcosine Drugs 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 229960001153 serine Drugs 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- KKDONKAYVYTWGY-UHFFFAOYSA-M sodium;2-(methylamino)ethanesulfonate Chemical compound [Na+].CNCCS([O-])(=O)=O KKDONKAYVYTWGY-UHFFFAOYSA-M 0.000 description 1
- WUWHFEHKUQVYLF-UHFFFAOYSA-M sodium;2-aminoacetate Chemical compound [Na+].NCC([O-])=O WUWHFEHKUQVYLF-UHFFFAOYSA-M 0.000 description 1
- QJEOJNTXXKYIDP-UHFFFAOYSA-M sodium;3-ethoxypropane-1-sulfonate Chemical compound [Na+].CCOCCCS([O-])(=O)=O QJEOJNTXXKYIDP-UHFFFAOYSA-M 0.000 description 1
- BWYYYTVSBPRQCN-UHFFFAOYSA-M sodium;ethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=C BWYYYTVSBPRQCN-UHFFFAOYSA-M 0.000 description 1
- DZXBHDRHRFLQCJ-UHFFFAOYSA-M sodium;methyl sulfate Chemical compound [Na+].COS([O-])(=O)=O DZXBHDRHRFLQCJ-UHFFFAOYSA-M 0.000 description 1
- WPLOVIFNBMNBPD-ATHMIXSHSA-N subtilin Chemical compound CC1SCC(NC2=O)C(=O)NC(CC(N)=O)C(=O)NC(C(=O)NC(CCCCN)C(=O)NC(C(C)CC)C(=O)NC(=C)C(=O)NC(CCCCN)C(O)=O)CSC(C)C2NC(=O)C(CC(C)C)NC(=O)C1NC(=O)C(CCC(N)=O)NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C1NC(=O)C(=C/C)/NC(=O)C(CCC(N)=O)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)CNC(=O)C(NC(=O)C(NC(=O)C2NC(=O)CNC(=O)C3CCCN3C(=O)C(NC(=O)C3NC(=O)C(CC(C)C)NC(=O)C(=C)NC(=O)C(CCC(O)=O)NC(=O)C(NC(=O)C(CCCCN)NC(=O)C(N)CC=4C5=CC=CC=C5NC=4)CSC3)C(C)SC2)C(C)C)C(C)SC1)CC1=CC=CC=C1 WPLOVIFNBMNBPD-ATHMIXSHSA-N 0.000 description 1
- JDVPQXZIJDEHAN-UHFFFAOYSA-N succinamic acid Chemical compound NC(=O)CCC(O)=O JDVPQXZIJDEHAN-UHFFFAOYSA-N 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- FDDDEECHVMSUSB-UHFFFAOYSA-N sulfanilamide Chemical compound NC1=CC=C(S(N)(=O)=O)C=C1 FDDDEECHVMSUSB-UHFFFAOYSA-N 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229960003080 taurine Drugs 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000004685 tetrahydrates Chemical class 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- VZZUPGZLDMTMFL-UHFFFAOYSA-N triazine;trithiole Chemical compound S1SC=CS1.C1=CN=NN=C1 VZZUPGZLDMTMFL-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- ZENOXNGFMSCLLL-UHFFFAOYSA-N vanillyl alcohol Chemical compound COC1=CC(CO)=CC=C1O ZENOXNGFMSCLLL-UHFFFAOYSA-N 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/04—Heavy metals
- C23F3/06—Heavy metals with acidic solutions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3205—Deposition of non-insulating-, e.g. conductive- or resistive-, layers on insulating layers; After-treatment of these layers
- H01L21/321—After treatment
- H01L21/32115—Planarisation
- H01L21/3212—Planarisation by chemical mechanical polishing [CMP]
Definitions
- the present invention relates to a metal polishing solution and a polishing method particularly suitable for use in polishing in a wiring forming step of a semiconductor device.
- LSI semiconductor integrated circuit
- CMP chemical mechanical polishing
- the general method of metal CMP is to apply a polishing pad on a circular polishing platen (platen), immerse the polishing pad surface with a metal polishing solution, and press the surface of the substrate on which the metal film is formed.
- the polishing platen is rotated while applying a predetermined pressure (hereinafter, referred to as a polishing pressure) from the back surface, and the metal film of the convex portion is removed by mechanical friction between the polishing liquid and the convex portion of the metal film. is there.
- the metal polishing liquid used for CMP is generally composed of an oxidizing agent and solid abrasive grains, and a metal oxide dissolving agent and a protective film forming agent are further added as necessary. It is considered that the basic mechanism is to first oxidize the metal film surface by oxidation, and to scrape off the oxide layer with solid abrasive grains. Since the oxide layer on the metal surface of the concave portion does not much touch the polishing pad and does not have the effect of the abrasion by the solid abrasive grains, the metal layer of the convex portion is removed as the CMP progresses, and the surface of the substrate is flattened. The details are disclosed in Journal of Chemicals Society of Japan, Chemical Society, Vol. 13, No. 11 (published in 1991), pp. 340-60-364.
- metal oxide particles removed by the solid abrasive particles are dissolved in the polishing liquid by a metal oxide dissolving agent, the effect of the solid abrasive particles will increase.
- etching oxidized layer on the surface of the metal film in the recess
- the metal film surface is further oxidized by an oxidizing agent. It is feared that the etching of the metal will progress and the flattening effect will be lost.
- a protective film forming agent is further added.
- Metal oxide dissolving agent and protection It is important to balance the effects of the film forming agent. It is desirable that the oxide layer on the surface of the metal film is not etched so much, that the particles of the oxide layer that have been removed are efficiently dissolved, and that the polishing rate by CMP is high. .
- the CMP rate that is, the polishing rate by CMP
- the damage to the surface of the metal layer to be CMP Damage
- metal oxide dissolving agents consisting of aminoacetic acid such as glycine or amide sulfuric acid and benzotriazole (hereinafter referred to as “benzotriazole”)
- benzotriazole A method using a metal polishing solution containing BTA. This technique is described in, for example, Japanese Patent Application Laid-Open No. 8-83780.
- the present invention provides a metal polishing liquid and a polishing method capable of forming a highly reliable embedded pattern of a metal film while sufficiently reducing an etching rate and maintaining a high CMP rate. Things.
- the metal polishing slurry of the present invention includes an oxidizing agent for oxidizing a metal, a metal oxide dissolving agent, a first protective film forming agent, a second protective film forming agent different from the first protective film forming agent, Contains water.
- the protective film forming agent forms a protective film on the metal surface.
- first protective film forming agent at least one selected from nitrogen-containing compounds such as ammonia, alkylamine, amino acid, imine, and azole and salts thereof, and mercaptan, glucose, and cellulose is preferable.
- nitrogen-containing compounds such as ammonia, alkylamine, amino acid, imine, and azole and salts thereof, and mercaptan, glucose, and cellulose is preferable.
- These first protective film forming agents are compounds that form a protective film by forming a physical adsorption and / or a chemical bond on the surface of the metal film.
- Examples of the second protective film forming agent include alcohols (ie, compounds having an alcoholic hydroxyl group), phenols (ie, compounds having a phenolic hydroxyl group), esters, ethers, polysaccharides, amino acid salts, polycarboxylic acids, and the like. At least one selected from salts thereof, bier polymers, sulfonic acids and salts thereof, aromatic amines, amides, azo compounds and molybdenum compounds is preferred.
- These second protective film forming agents include a protective film formed by the first protective film forming agent. A compound that helps to form.
- the oxidizing agent is preferably at least one selected from hydrogen peroxide, nitric acid, potassium periodate, hypochlorous acid and ozone water.
- metal oxide dissolving agent at least one selected from organic acids, ammonium salts thereof, and sulfuric acid is preferable.
- the first protective film forming agent required to exhibit the effect of suppressing the etching rate to 10 nm or less without including the second protective film forming agent among the protective film forming agents is provided.
- the second protective film-forming agent By adding the second protective film-forming agent to the additive concentration A, the first protective film-forming agent having a lower concentration than the concentration A is contained to suppress the etching speed to 1 O nm Z minutes or less.
- the present invention provides a metal polishing liquid capable of exhibiting the above effect. That is, in this case, the second protective film forming agent is a compound that reduces the amount of the first protective film forming agent necessary to suppress the etching rate to 10 nmZ or less.
- the polishing method of the present invention is a polishing method of removing the metal film on the surface of the object to be polished by polishing in the above-described metal polishing slurry of the present invention. Copper, copper alloy, copper oxide, copper alloy oxide, etc. are suitable for the metal film to be removed. Therefore, in the present invention, a metal film comprising a laminated film including at least one metal layer selected from copper, a copper alloy, a copper oxide, and a copper alloy oxide using the above-described metal polishing slurry. There is provided a polishing method for removing at least a part of the metal film by the step of polishing the metal.
- a polishing liquid and a polishing method using the polishing liquid which have sufficiently reduced the etching rate while maintaining the CMP rate are provided. Offer You.
- the first protective film forming agent one that easily forms a chelate complex with copper, for example, ethylene diaminetetraacetic acid, benzotriazole, or the like is used.
- the effect of forming these metal surface protective films is extremely strong. For example, if 0.5% by weight or more is contained in the metal polishing solution, the copper alloy film will not be etched or even CMP will be eliminated.
- the present inventors have found that by using a second protective film-forming agent different from the first protective film-forming agent in combination, even if the concentration of the first protective film-forming agent is low, it is sufficient. It has been found that a low etching rate can be suppressed. Moreover, it was found that when such a polishing liquid was used, favorable characteristics were obtained such that the CMP rate was not significantly reduced even when the etching rate was reduced. In addition, they found that using a combination of the first protective film forming agent and the second protective film forming agent enabled polishing at a practical CMP rate without including solid abrasive grains in the polishing liquid. Was. This is thought to be due to the fact that the grinding effect of the abrasive pad caused the friction effect of the conventional solid abrasive grains.
- the value of the etching rate to be suppressed can be suppressed to 1 OnmZ or less, a preferable flattening effect can be obtained. It is desirable that the etching rate be lower as long as the reduction of the CMP rate can be tolerated.If it can be suppressed to 5 n minutes or less, for example, about 50% excess CMP (the time required to remove the metal film by CMP) Performing 1.5 times CMP) does not cause any dating problems. If the etching rate can be suppressed to 1 n minutes or less, dishing will not be a problem even if the excess CMP of 100% or more is performed.
- the etching rate in this specification is not When the polishing object is immersed and the polishing liquid is stirred at a liquid temperature of 25 and a stirring speed of 100 rpm, the metal film (copper film formed by sputtering) on the surface of the object to be polished is etched. This is the speed obtained by converting the difference in metal film thickness before and after immersion from the electrical resistance value and dividing this by the immersion time.
- the CMP rate (ie, chemical mechanical polishing rate) was determined under the conditions of a polishing pressure of 210 g / cm 2 , a relative speed of 36 mZ between the workpiece and the polishing platen, and a liquid temperature of 25 ° C. Then, the metal film (copper film formed by sputtering) on the surface of the object to be polished is polished, and the difference in metal film thickness before and after polishing is calculated from the electric resistance value, which is divided by the processing time. Speed.
- the friction with the polishing pad which is much softer than the polishing pad without relying on the strong mechanical friction by the solid abrasive grains, is provided.
- CMP planarization can be realized.
- a metal film containing copper, a copper alloy (such as copper chromium) is formed and filled on a substrate having a concave portion on the surface by using the metal polishing slurry of the present invention.
- a polishing method for polishing is provided.
- the metal film on the convex portion of the substrate is selectively CMP, leaving the metal film in the concave portion to obtain a desired conductor pattern.
- the polishing liquid of the present invention may be substantially free of solid abrasive grains, and the scratches are dramatically reduced because CMP proceeds by friction with a polishing pad that is much more mechanically softer than solid abrasive grains. Is done.
- the metal polishing slurry of the present invention contains an oxidizing agent, a metal oxide dissolving agent, a first protective film forming agent, a second protective film forming agent, and water as essential components. Solid abrasive grains need not be substantially contained, but they are also used.
- a metal oxidizing agent hydrogen peroxide (H 2 ⁇ 2), nitrate, Kayo ⁇ periodate mosquito Li um, hypochlorous acid, ozone water and the like.
- the substrate is a silicon substrate including integrated circuit elements, contamination with alkali metals, alkaline earth metals, halides, etc. is not desired, and an oxidizing agent containing no nonvolatile components is desirable.
- hydrogen peroxide is the most preferred because ozone water has a drastic change in composition over time.
- an oxidizing agent containing a non-volatile component may be used.
- the metal oxide dissolving agent be water-soluble.
- Water-soluble metal oxide dissolving agents include
- ammonium salts of these organic acids examples include ammonium salts such as ammonium persulfate, ammonium nitrate, and ammonium chloride; inorganic acids such as sulfuric acid and chromic acid; and ammonia complexes. These may be used alone or in any combination May be used.
- a laminated film including a metal layer made of copper, copper alloy, copper oxide and / or copper alloy oxide of these, formic acid, malonic acid, lingic acid, tartaric acid, and citric acid are preferable. . These are the
- linoleic acid, tartaric acid, and citric acid are preferable because they can effectively suppress the etching rate while maintaining a practical CMP rate.
- Alkyl amines such as dimethylamine, trimethylamine, triethylamine, propylenediamine, ethylenediaminetetraacetic acid (hereinafter abbreviated as EDTA), sodium getyldithiol, sodium rubamate and chitosan, etc. Amine;
- Glycine L—Alanine, / 3—Alanine, L—2—Aminobutyric acid, L—Nornoline, L-Linoline, L—Leucine, L—Norguchi-Isine, L-Iso L-leucine, L-aloi-so-leucine, L-pheniralanine, L-prolin, sarcosine, L-ornithin, L-lysine, taurine, L-serine, L-threonine , L—a mouth threonine, L—homoserine, L-tyrosine, 3, 5—jo—do L—tyrosine, ⁇ — (3,4 dihydroxyphenyl) 1 L—aranine, L—thyroxine, 4— Hydroxy—L—Proline, L—Cistin, L-methionine, L—Ethionine, L—Lancionin, L—Cission, L—Cystine, L—C
- Dithizone Dithizone, cuproin (2,2'-biquinoline), neocupine (2,9-dimethyl-11,10-phenanthine), bathocuproine (2,9-dimethyl-4,7) Imines, such as —diphenyl-1,1,10—phenanthroline and cuperazone (biscyclohexanoxoxalylhydrazone);
- Azoles such as [(1-benzotriazolyl) methyl] phosphonic acid
- Mercap resins such as nonyl mercaptan, dodecyl mercaptan, triazine thiol, triazine dithiol, triazine trithiol, etc .; and,
- sugars such as glucose and cellulose. These may be used alone or in combination as appropriate.
- chitosan, ethylenediaminetetraacetic acid, L-tributofan, cuperazone, triazinedithiol, benzotriazole, 4-hydroxybenzotriazole, and 4-hydroxylboxyl — 1H-benzotriazolebutyl ester, tritolytriazole and naphthotriazole are preferred for both high CMP and low etch rates.
- benzotriazole and its derivatives are preferred.
- examples of the benzotriazole derivative include the above-mentioned azoles.
- Phenols such as 4-methylphenol, 4-ethylfurenol and 4-propylphenol
- Esters such as glycerin ester, sorbin ester, methoxyacetic acid, ethoxyacetic acid, 3-ethoxypropionic acid and alaninetyl ester;
- Polysaccharides such as alginic acid, pectic acid, carboxymethylcellulose, dextran and pullulan;
- Amino acid salts such as glycine ammonium salt and glycine sodium salt; Polyaspartic acid, Polyglutamic acid, Polylysine, Polylingic acid, Polyacrylic acid, Polyacrylic acid ammonium salt, Polymeric sodium salt , Polyamic acid, polymaleic acid, polyitaconic acid, polyfumaric acid, poly (P-styrene carboxylic acid), polyacrylic acid, polyacrylamide, aminopolyacrylamide , Polyacrylic acid ammonium salt, polyacrylic acid sodium salt, polyamic acid, polyamic acid ammonium salt, polyamic acid sodium salt, polydalioxylic acid, etc. Polycarboxylic acids and salts thereof;
- Vinyl polymers such as polyvinyl alcohol, polyvinylpyrrolidone and polyacrylone;
- Methyl ammonium phosphate sodium methyltaurate, sodium methyl sulfate, ethyl ammonium sulfate, butyl ammonium sulfate, sodium vinyl sulfonate 1-sodium sodium sulfonate, 2-sodium sodium sulfonate, sodium methoxymethylsulfonate, ammonium ethoxymethylsulfonate, 3-ethoxypropylsulfate Sodium sulfonate, sodium methoxymethylsulfonate, ammonium ethoxymethylsulfonate, sodium 3-ethoxypropylsulfonate, sodium sulfosuccinate, etc.
- aromatic amines such as aniline, N, N-dimethylaniline and benzylamine; propionamide , Acrylamide, methylurea, nicotinamide, succinic acid amide, phenylacetic acid amide, pyridin-4-carboxamide, N, N'-dibenzyl-L-tartaric acid amide and sulfanilamide Amide; 1,1'-azobis (cyclohexane-111-carbonitrile), 1,1, -azobis (1-acetoxy-1-1-phenylethane), 2,2'-azobis (2,4-dimethylnorrelonitrile) ), 2,2'-azobis (4—methoxy 2,4—dimethylnoreronitrile), 2,2'-azobis (isobutyric acid) dimethyl, 2,2'-azobis (isobutyronitrile), 2 — [2— (3,5—dibromopyridyl) azo]
- Molybdenum compounds such as sodium molybdenum (VI) acid dihydrate and hexaammonium heptamolybdate (VI) acid tetrahydrate are listed. These may be used alone or in combination as appropriate.
- the substrate to be applied is a silicon substrate for a semiconductor integrated circuit, etc.
- contamination with an alkali metal, an alkaline earth metal, a halide, or the like is not desirable, and therefore, an acid or an ammonium salt thereof is desirable.
- the base is a glass substrate or the like.
- 2-methyl-3 nitrobenzyl alcohol, propylene glycol, polyaspartic acid, polylingic acid, polyacrylic acid, polymer acrylic acid, polyacrylic acid Ammonium acid, poly (methacrylic acid) ammonium, poly (amic acid), poly (acrylic acid) ammonium, polyacrylamide, methyl ester Sodium phosphate, benzylamine, nicotinamide, sulfanilamide, congo red, and heptamolybdenate (VI) hexaammonium tetrahydrate have both high CMP and low etch rates.
- polyacrylic acid, polymethacrylic acid, polyamic acid, ammonium polyacrylic acid, ammonium polymethacrylate, ammonium polyamic acid, and polyacrylamide are preferred. .
- the metal film to which the present invention is applied is a laminated film containing at least one selected from copper, copper alloy, copper oxide, and copper alloy oxide (hereinafter collectively referred to as copper alloy). is there.
- the present invention provides a metal polishing liquid having a CMP speed of at least lOOnmZ minutes and an etching speed of at most 10 nmz minutes.
- the polishing liquid having such characteristics is realized for the first time according to the present invention, and includes a metal oxidizing agent, a metal oxide dissolving agent and water, and further includes a first protective film forming agent and a first protective film forming agent. This can be achieved by combining and combining a second protective film forming agent different from the first protective film forming agent.
- first protective film forming agent Z a combination of the first protective film forming agent and the second protective film forming agent that can be used is shown as a first protective film forming agent Z and a second protective film forming agent. Note that these combinations are merely examples, and the present invention is not limited to these. Other combinations may be used as appropriate.
- Combinations with a CMP rate of 100 nm or more and an etching rate of 100 nm or less include, for example, cuperazone polyphosphoric acid, cuperazone Z polyaspartic acid, cuperazone polyacrylamide, L Tributane Z poly acrylic Amid, L-tributophane / polyacrylic ammonium, L-tributofan polyacrylic acid, benzotriazole polyacrylamide, benzotriazole Z polyammonium, naphtho Triazole / polylingoic acid, naphthotriazole Z2—methyl-3-ditrobenzyl alcohol, triazindithiol Z polyaspartic acid, triazindithiol / polyacrylamide, etc. .
- cuperazonnopolyacrylamide, L-tributophane / polyacrylamide, L-trimethyl Butofanopolyammonium acrylate, benzotriazole polyacrylamide, benzotriazole polyammonium acrylate, naphthotriazole polylingoic acid, triazindithiol / polyaspartic acid, triazindithiol Polyacrylamide and the like can be mentioned.
- Examples of a combination in which the CMP speed is equal to or more than 250 nmZ and the etching speed is equal to or less than 10 nmZ include cuperazone Z polylactic acid.
- the amount of the oxidizing agent is 0.03 mol based on 100 g of the total amount of the oxidizing agent, the metal oxide dissolving agent, the first protective film forming agent, the second protective film forming agent and water.
- the amount is preferably from 0.7 to 0.7 mol, more preferably from 0.03 mol to 0.5 mol, and particularly preferably from 0.2 mol to 0.3 mol. If the amount is less than 0.003 mo1, metal oxidation is insufficient and the CMP rate is low, and if it exceeds 0.7 mol, the polished surface becomes rough. Tend.
- the mixing amount of the metal oxide dissolving agent component in the present invention is as follows, based on 100 g of the total amount of the oxidizing agent, the metal oxide dissolving agent, the first protective film forming agent, the second protective film forming agent, and water. ⁇ 0.005 mol, more preferably 0.0005 mol-0.025 mol, more preferably 0.005 mol-0.00 mol. It is particularly preferred that the content be 0.15 mol. If the amount is more than 0.05 mol, it tends to be difficult to suppress etching.
- the compounding amount of the first protective film forming agent is 0.000 with respect to 100 g of the total amount of the oxidizing agent, the metal oxide dissolving agent, the first protective film forming agent, the second protective film forming agent, and water. It is preferably from 0.1 mol to 0.05 mol, more preferably from 0.003 mol to 0.05 mol, more preferably from 0.005 mol to 0.035 mol. It is particularly preferred that If the amount is less than 0.001 lmo1, it tends to be difficult to suppress the etching. If the amount exceeds 0.05 mol1, the CMP speed tends to be low.
- the compounding amount of the second protective film forming agent is 0.00 with respect to 100 g of the total amount of the oxidizing agent, the metal oxide dissolving agent, the first protective film forming agent, the second protective film forming agent, and water. It is preferably from 1 to 0.3% by weight, more preferably from 0.003% to 0.1% by weight, even more preferably from 0.01% to 0.08% by weight. I like it. If the amount is less than 0.001% by weight, the effect of using the first protective film-forming agent in combination tends not to be exhibited in suppressing etching. If the amount exceeds 0.3% by weight, the CMP speed decreases. Tend to be.
- the degree of occurrence of polishing scratches depends on the grain size, grain size distribution and shape of the solid abrasive grains, and the thickness of the film is reduced by erosion of the insulating film (hereinafter referred to as erosion) and the flattening effect is reduced.
- Deterioration depends on the grain size of the solid abrasive grains and the physical properties of the polishing pad, and when the metal film, especially the copper film surface, is treated with BTA, the dishing of the metal film causes the hardness of the polishing pad to decrease. It is thought to depend on the chemical properties of the polishing liquid.
- hard solid abrasive grains are necessary for the progress of CMP, but are not desirable for improving the flattening effect of CMP and the integrity of CMP plane (no damage such as polishing scratches). It can be seen that the leveling effect actually depends on the characteristics of the polishing pad, which is softer than solid abrasive grains.
- the present invention is considered to be extremely desirable for CMP of a copper alloy and, consequently, formation of a buried pattern using the same, in that CMP can proceed without solid abrasive grains. .
- the first protective film forming agent has an action of forming a strong protective film on the metal surface.
- a strong protective film For example, when the surface of a copper alloy film is exposed to a solution containing BTA, the structure of Cu (I) BTA or Cu ( ⁇ ) BTA is caused by the reaction of copper (Cu) or its oxide with BTA. It is considered that a polymer-like complex compound film whose main skeleton is formed is formed.
- This film is quite strong, and when a metal polishing liquid containing 0.5% by weight of BTA is used, generally even if the polishing liquid contains solid abrasive grains, it is hardly polished.
- the metal polishing slurry is prepared by using only the second protective film forming agent alone without using the first protective film forming agent, it is particularly difficult to suppress the etching speed and the protective effect is sufficient. Not.
- the first protective film forming agent and the second protective film forming agent have different functions, and different types of protective films are formed depending on the type of the protective film forming agent.
- the present invention by using the above-mentioned first and second protective film forming agents in combination, it is possible to achieve both the suppression of the etching rate and the maintenance of the CMP rate, and also eliminates the need for strong friction caused by solid abrasive grains. It is based on new knowledge that
- polishing conditions are as follows. ⁇ Polishing conditions ⁇
- Substrate to be polished Silicon substrate with a 1 / x m thick copper film Polished pad: IC100 (manufactured by Kuchidael)
- CMP speed The difference in thickness of the copper film before and after CMP was calculated from the electrical resistance value and divided by the processing time. The processing time was 1 minute.
- Etching rate A substrate similar to the above-mentioned substrate to be polished is separately prepared, and immersed in a polishing solution while stirring at a room temperature (25) (a stirring speed of lOO rpm). It was calculated from the resistance value and divided by the immersion time. The immersion time was 10 minutes.
- Example 1 Cuhefuzone polylinocholic acid 0
- Example 2 Cuperazone polyaspaffunic acid 234 1.9
- Example 3 Cahefuzone polyacrynoleamide 187 0.3
- Example 4 L-tryptophan polyacrylamide 219 0.9
- Example 5 L-tryptophan Ammonium polyacrylate 210 0.7
- Example 6 L-Tryptophan polymalic acid 252 2.2
- Example 8 Benzotriazole polyacrylamide 196 0.4
- Example 9 Naphthotriazole polylinkic acid 203 0.5
- Example 10 Naphthotriazole 2-methyl-3-nitrobenzyl 2121.1 Alcohol
- Example 11 Triazinedithionore polyaspartic acid 186 0.4
- Example 12 Triazinedithiol polyacrylamide 224 1.0 Comparative Example 1 (none) 255 15.3 Comparative Example 2 L-Tributophan (none) 287 10.3 Comparative Example 3 Benzotriazonole (none ) 93 2.4 Comparative Example 4 Naphthotriazole (none) 72 2.1 Comparative Example 5 Triazinedithiol (none) 98 4.8
- Example 13 Triazinedithionore polyaspartic acid 186 0.4
- Example 12 Triazinedithiol polyacrylamide 224 1.0 Comparative Example 1 (none) 255 15.3 Comparative Example 2 L-Tributophan (none) 287 10.3 Comparative Example 3 Benzotriazonole (none ) 93 2.4 Comparative Example 4 Naphthotriazole (none) 72 2.1 Comparative Example 5 Triazinedithiol
- Example 14 When a CMP experiment was performed using this metal polishing solution under the same conditions as in Example 1, the CMP rate was 287 nm Z minute, and the etching rate was 3.6 nm Z minute. Was. However, the groove The substrate on which the turns were formed was CMP-polished 50% more than the CMP time required to remove the specified thickness by CMP, and observed with an electron microscope. The dishing at about 200 nm was about 200 nm. In order to suppress dishing to 100 nm or less, it was necessary to limit the excess CMP time to 20%. Erosion and polishing scratches did not occur. Example 14
- DL- Linguic acid (special grade reagent) 0.15 parts by weight of water and 70 parts by weight of water are added and dissolved. To this, a solution of 0.2 parts by weight of BTA dissolved in 0.8 parts by weight of methanol is added. After the addition, 0.125 parts by weight of ammonium polyacrylate was added as a 40% aqueous solution, and finally, 33.2 parts by weight of aqueous hydrogen peroxide (special grade reagent, 30% aqueous solution) was added. A polishing liquid for metal was obtained.
- DL-ligonic acid which is a highly water-soluble organic acid is used as a metal oxide dissolving agent, and a water-soluble polyacrylic acid ammonium salt is used as a second protective film forming agent. I have.
- Example 15 Using this metal polishing liquid, a CMP experiment was performed under the same conditions as in Example 1. As a result, the CMP rate was as high as 185 nmZ and the etching rate was as low as 0.2 nmZ. Also, the substrate on which the groove pattern was actually formed was subjected to CMP in the same manner as the above CMP conditions and observed as described above. No erosion or polishing scratches occurred below 50 nm.
- a metal polishing slurry was prepared in the same manner as in Example 14 except that DL-tartaric acid was used instead of DL-lingoic acid, and a CMP experiment was performed in the same manner as in Example 1.
- the polishing rate was as high as 194 nmZ, and the etching rate was 0.8 nmZ.
- the dishing when the excessive CMP polishing was performed for 50% of the time was about 70 nm. No erosion and polishing scratches occurred.
- a polishing slurry for metal was prepared in the same manner as in Example 13 except that citric acid was used instead of D L -lingoic acid, and a CMP experiment was performed in the same manner as in Example 1.
- the CMP rate was high at 213 nm, but the etching rate was slightly lower at 4.6 nm.
- the dishing was about 150 nm or less, and erosion and polishing scratches were observed. Did not occur. Comparative Example 6
- a polishing slurry for metal was prepared in the same manner as in Example 13 except that ammonium polyacrylate was not added, and a CMP experiment was performed in the same manner as in Example 1.
- the CMP rate was slightly inferior to 140 nm / min, but the etching rate was inferior to 10.3 nm Zmin.
- the same groove pattern as in Example 13 was formed.
- the substrate thus obtained was subjected to CMP polishing for an amount of time equivalent to 30%, and as a result of observing the substrate surface, the dicing increased to about 30 O nm. No erosion or polishing scratches were observed. Comparative Example 7
- Metal polishing was carried out in the same manner as in Example 13 except that polyacrylic acid ammonium was not used, and the amount of benzotriazole added was increased from 0.1 part by weight to 0.2 part by weight.
- a liquid was prepared, and a CMP experiment was performed in the same manner as in Example 1 using the liquid. As a result, the etching rate was good at 2.4 nmZ, but the CMP rate was inferior at 93 nmZ. Further, after the substrate on which the groove pattern similar to that of Example 13 was formed was subjected to an excessive CMP polishing for a time equivalent to 30%, and the surface of the substrate was observed, the dishing was found to be about 150 nm. It was not a satisfactory value.
- the etching rate was low, the CMP rate was also low, which is probably because the CMP took a long time. No erosion or scratching occurred.
- the effect of adding only the first protective film forming agent to a predetermined concentration to suppress the etching rate to 1 On mZ or less can be obtained by using the second protective film forming agent together.
- the effect was achieved even when the concentration of the first protective film forming agent was lower, and the effect of maintaining a higher CMP rate was exhibited.
- INDUSTRIAL APPLICABILITY As described above, according to the present invention, an etching rate can be sufficiently reduced, a high CMP rate can be maintained, and a highly reliable buried pattern can be formed.
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Description
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Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
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US09/763,891 US6896825B1 (en) | 1998-08-31 | 1999-08-31 | Abrasive liquid for metal and method for polishing |
KR10-2004-7006306A KR100491465B1 (ko) | 1998-08-31 | 1999-08-31 | 금속용 연마액 및 연마 방법 |
AU54458/99A AU5445899A (en) | 1998-08-31 | 1999-08-31 | Abrasive liquid for metal and method for polishing |
EP99940570.7A EP1137056B1 (en) | 1998-08-31 | 1999-08-31 | Abrasive liquid for metal and method for polishing |
JP2000568110A JP3337464B2 (ja) | 1998-08-31 | 1999-08-31 | 金属用研磨液及び研磨方法 |
CA002342332A CA2342332A1 (en) | 1998-08-31 | 1999-08-31 | Abrasive liquid for metal and method for polishing |
US10/995,494 US8038898B2 (en) | 1998-08-31 | 2004-11-24 | Abrasive liquid for metal and method for polishing |
US13/218,590 US8491807B2 (en) | 1998-08-31 | 2011-08-26 | Abrasive liquid for metal and method for polishing |
Applications Claiming Priority (4)
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JP10/245616 | 1998-08-31 | ||
JP24561698 | 1998-08-31 | ||
JP35118898 | 1998-12-10 | ||
JP10/351188 | 1998-12-10 |
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US09/763,891 A-371-Of-International US6896825B1 (en) | 1998-08-31 | 1999-08-31 | Abrasive liquid for metal and method for polishing |
US09763891 A-371-Of-International | 1999-08-31 | ||
US09/976,001 Continuation US6899821B2 (en) | 1998-08-31 | 2001-10-15 | Abrasive liquid for metal and method for polishing |
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WO2000013217A1 true WO2000013217A1 (fr) | 2000-03-09 |
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PCT/JP1999/004694 WO2000013217A1 (fr) | 1998-08-31 | 1999-08-31 | Liquide abrasif pour le polissage de metaux et procede correspondant |
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US (4) | US6896825B1 (ja) |
EP (2) | EP2242091B1 (ja) |
JP (1) | JP3337464B2 (ja) |
KR (2) | KR100491465B1 (ja) |
CN (2) | CN1204602C (ja) |
AU (1) | AU5445899A (ja) |
CA (1) | CA2342332A1 (ja) |
TW (1) | TW476777B (ja) |
WO (1) | WO2000013217A1 (ja) |
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JP2002313759A (ja) * | 2001-04-18 | 2002-10-25 | Fujimi Inc | 研磨用組成物およびそれを用いた研磨方法 |
WO2003021651A1 (fr) * | 2001-08-16 | 2003-03-13 | Asahi Kasei Chemicals Corporation | Fluide de polissage conçu pour un film metallique et procede de production d'un substrat semi-conducteur au moyen de ce fluide de polissage |
US6607424B1 (en) | 1999-08-24 | 2003-08-19 | Rodel Holdings, Inc. | Compositions for insulator and metal CMP and methods relating thereto |
US6632259B2 (en) | 2001-05-18 | 2003-10-14 | Rodel Holdings, Inc. | Chemical mechanical polishing compositions and methods relating thereto |
WO2004111157A1 (ja) * | 2003-06-13 | 2004-12-23 | Hitachi Chemical Co., Ltd. | 金属用研磨液及び研磨方法 |
JP2006121101A (ja) * | 1999-08-13 | 2006-05-11 | Cabot Microelectronics Corp | 停止化合物を伴う化学機械的研磨系及びその使用方法 |
US7183211B2 (en) | 2002-01-25 | 2007-02-27 | Jsr Corporation | Process for chemical mechanical polishing of semiconductor substrate and aqueous dispersion for chemical mechanical polishing |
US7232529B1 (en) | 1999-08-26 | 2007-06-19 | Hitachi Chemical Company, Ltd. | Polishing compound for chemimechanical polishing and polishing method |
JP2007227583A (ja) * | 2006-02-23 | 2007-09-06 | Fujifilm Corp | 金属用研磨液 |
JP2008042216A (ja) * | 2007-09-11 | 2008-02-21 | Jsr Corp | 化学機械研磨用水系分散体 |
US7550388B2 (en) | 2004-03-24 | 2009-06-23 | Fujima Incorporated | Polishing composition and polishing method |
JP2009283979A (ja) * | 2009-08-24 | 2009-12-03 | Hitachi Chem Co Ltd | 金属用研磨液及び研磨方法 |
JP2010263246A (ja) * | 1998-12-28 | 2010-11-18 | Hitachi Chem Co Ltd | 金属用研磨液及びそれを用いた研磨方法 |
US8080476B2 (en) | 2006-08-02 | 2011-12-20 | Fujimi Incorporated | Polishing composition and polishing process |
CN1854234B (zh) * | 2005-04-21 | 2013-03-20 | 安集微电子(上海)有限公司 | 抛光浆料及其用途和使用方法 |
US8460414B2 (en) | 2005-04-14 | 2013-06-11 | Mitsui Chemicals, Inc. | Polishing slurry and polishing material using same |
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US20120048830A1 (en) | 2012-03-01 |
US8491807B2 (en) | 2013-07-23 |
CA2342332A1 (en) | 2000-03-09 |
EP2242091A1 (en) | 2010-10-20 |
CN1325540A (zh) | 2001-12-05 |
EP1137056B1 (en) | 2013-07-31 |
KR100462132B1 (ko) | 2004-12-17 |
KR100491465B1 (ko) | 2005-05-25 |
AU5445899A (en) | 2000-03-21 |
CN1680511A (zh) | 2005-10-12 |
US20050095860A1 (en) | 2005-05-05 |
EP2242091B1 (en) | 2013-07-31 |
JP3337464B2 (ja) | 2002-10-21 |
EP1137056A4 (en) | 2004-09-22 |
EP1137056A1 (en) | 2001-09-26 |
KR20010073037A (ko) | 2001-07-31 |
US6896825B1 (en) | 2005-05-24 |
US6899821B2 (en) | 2005-05-31 |
CN1204602C (zh) | 2005-06-01 |
CN100381537C (zh) | 2008-04-16 |
KR20040058017A (ko) | 2004-07-02 |
TW476777B (en) | 2002-02-21 |
US20020017630A1 (en) | 2002-02-14 |
US8038898B2 (en) | 2011-10-18 |
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